Process for overcoming defects of suffocation and cold shut in casting of green sand cast steel exhaust manifold

• Main Authors: CHEN WEI, WANG XUYANG, WANG SHANSHAN, REN BAOZI, CHENG KAI, LIU JINGHAI, LI YING, SHI YUFENG, TIAN SHUTAO, HUANG XINHUAI
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2024
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FOUNDRY MOULDING; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of exhaust manifold casting, and discloses a process for solving the suffocation and cold shut defects in casting of a green sand cast steel exhaust manifold, which comprises a casting, the casting comprises an upper mold cavity and a lower mold cavity, the upper mold cavity and the lower mold cavity form a group of molds, the number of the molds is four, the four groups of molds are correspondingly arranged, and a pouring system is arranged between two groups of corresponding molds. According to the pouring system, a negative pressure vacuum area can be prevented from being formed in local positions of the straight pouring gate and the transverse pouring gate, gas wrapping and gas entrapment caused by turbulent flow of molten steel are avoided, the molten steel in the transverse pouring gate can be effectively buffered, and the molten steel in the transverse pouring gate can be effectively prevented from being blocked. Through the arrangement of the pouring system